Final answer:
More information is needed to calculate the equilibrium constant at 316.15 K for the reaction NH3(g) + HCl(g) ⇌ NH4Cl(s). The equilibrium constant varies with temperature, and without additional data, such as ΔG° or a known K value at a different temperature, the new K value cannot be determined.
Step-by-step explanation:
The question asks to calculate the equilibrium constant for the reaction NH3(g) + HCl(g) ⇌ NH4Cl(s) at 316.15 K. Without the given values for ΔG° or the equilibrium constants at other temperatures, it is not possible to calculate the equilibrium constant directly for this temperature. Normally, to find the new equilibrium constant at a different temperature, you would use the van't Hoff equation, which requires knowledge of either the original equilibrium constant at a known temperature or the standard Gibbs free energy change (ΔG°).
To answer the student's question accurately, more information is needed. However, we can say that the equilibrium constant is a measure of the extent to which a reaction will occur at a given temperature, and will differ based on the reaction conditions and the temperature at which the system is at equilibrium.
If we had the needed information, the calculation would involve using either the equilibrium constant at a known temperature or the Gibbs free energy change with the van't Hoff equation to determine the equilibrium constant at the new temperature.